There's a difference between being involved with a peer or with someone outside your reporting structure on the org chart, and being involved with someone who is inside your reporting structure. It's the differential in power when combined with sexual advances that creates problems, not the sexual advances alone.

Of course, unwanted sexual advances are a problem regardless of the relationship of the two parties, but unwanted or wanted advances between two people with a superior/subordinate relationship is where we get into trouble.

At all companies I've worked for in the US, there's never been a ban or stigma against colleagues dating, as long as there's no power differential between the two people. We still of course always expect people to behave professionally within a professional setting, but after-hours is your business.

If relationships between people with a power differential are commonplace in Italy, that's... unfortunate.